From: Dan Gruner
Subject: power analysis software: digest
Hello again,
Below you will find a digest of responses to my request for information on
power analysis software and shareware. A couple of the links seem very
useful as they provide links to the software providers. These you will
find as the first two entries in this digest. A big thanks to all those
who responded!
Dan
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A comprehensive list of power analysis software for microcomputers
This page is an attempt to provide an up-to-date list of microcomputer
software that can be used to calculate the power of statistical hypothesis
tests. It is maintained by Alejandro Escalante,
http://www.insp.mx/dinf/stat_list.htmlnts/s-archive/
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It has links to the following series of programs that do power
analysis, so you can download many of the programs. Some of these are
freeware/shareware, while others are commercial (some very expensive).
It gives the hardare requirements, who to contact, and that sort of
thing. Hope this helps.
http://www.interchg.ubc.ca/cacb/power/nts/s-archive/
CRCSSIZ
Datasim
Design Power
ECHIP
Egret SIZ
EpiInfo
Ex-Sample and Ex-Sample +
GAUSS
GLIM
G*POWER
Hyperstat
JMP
MacAnova
MONITOR
Microsoft Excel
MODSTAT
MSUstat
N
NCSS
NCSS-CALC
NCSS-PASS
NONCDIST and SMPLSIZE
nQuery advisor
NSurv
PC-SIZE and SIZE
Power
Power & Effect
Power and Precision
POWER.FOR
PowerPack
PowerPlant
POWPAL
Precision of survival studies
PS
R2
Sample Power
SAS
SHAZAM
Sigmastat
SIMSTAT
S-PLUS
SPSS
SOLO Power analysis
SSIZE
SST
STATGRAPHICS Plus
Statistica
Statistical power analysis
StatMate
STAT-POWER
Stats
STPLAN
Stata
SYSTAT Design
TRENDS
True EPISTAT
XLISP-STAT
wdist
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There is a good and free of charge program, G*Power available at
http://www.psychologie.uni-trier.de:8000/projects/gpower.html
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S-plus does power analyses for a number of different experimental designs.
You'll have to check and see if it works for your design, but I suspect it
will.
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I have used Monitor which I got off the Web from a USFWS website quite
simple and user friendly.
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If your experimental design will fit the framework of ANOVA or general
linear models, and if you use SAS for your data analysis, there are a
couple of options in SAS. There are at least 2 sets of macros available
from SAS Institute's web server (and probably included in the sample
library on the cd-rom) that perform moderately sophisticated power
analyses. There is also proc PLAN for generating complex designs,
although I haven't used it. They also have code for setting up lattice
designs, but that's not usually a question of statistical power.
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JMP (a SAS product) conducts power analyses and is available for the MAC,
and I believe for PCs.
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See Thomas, L. and C.J. Krebs. 1997. A review of statistical power analysis
software. Bulletin of the Ecological Society of America 78(2): 128-139. See
also the following web address for a list of power analysis software (you
can
even download a reprint of the review)
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SigmaStat (SPSS Inc.)provides power and sample size analysis for
t-tests,proportions,ANOVA,chi-square,and correlation.
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This probably isn't what you had in mind, but JMP (JuMP), a windows-based
package put out by the SAS institute can calculate power for a variety of
experimental designs. You can vary all the parameters in any combination and
get a complete list of power levels for all combinations entered.
JMP is a general stats package so it may cost more than you had in mind for
something just to do power analysis. I don't know the cost as I have only
used
a demo copy.
-----------------------
i've used a very nice package called Power and Precision. it is
available for windows, at least. they have a webpage, although i don't
have the URL handy at the moment; try searching "power and precision".
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Minitab v.11 or the newest is 12. Try, info@minitab.com &
http://www.minitab.com/.ni-trier.de:8000/projects/gpower.html This is the MOST complete statistical software I
have seen and I have worked as a consultant for three years and have
recently attained a v.11 release for my home use. Not free, but nothing
truely worth having is free of investment :).
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